Could very well be. The pressed on buttons for the US Army of the time did not have smooth surfaces. The label doesn't look like a US label either, though I know very little about this period of time between WW2 and Korea.

Hi and whats your concerns on this Item? They are CF Issue, did you know the Buttons are eatable. I S U Not! Those look like My Old winter Fatigues I was Issued with the suspenders went over your combat pants and longJohns, no Polar Fleece in those Times, however mine were in Nylon ??? those look like the older Style when this pattern came out and it wasn't in 1949.

Prior to unification in 1968, the uniforms of the Canadian Army, Royal Canadian Navy (RCN) and Royal Canadian Air Force (RCAF) were similar to their counterparts in the forces of the United Kingdom and other Commonwealth countries, save for national identifiers and some regimental accoutrements. The post unification uniforms bear little resemblance to their pre-1968 counterparts except in a few ceremonial cases.

Until the early 1960s, the Army Battle Dress uniform was worn both on parades and in combat. It was common to maintain traditional regimental distinctions, even in the thick of battle. A notable exception to this was the highland regiments, who were ordered to cease wearing their kilts in 1939 in favour of more generic service dress, the kilt being deemed "unsuitable for modern war".

By the time of the Korean War, more comfortable combat clothing was being designed, notably "Bush Dress", in dark green cotton and bearing a resemblance to the Khaki Drill uniform of the Second World War. Lightweight Service Dress known as "T-Dubs" were issued for parades in the summer months.

In the early 1960s, Battle Dress was replaced for field wear by the combat uniform, often referred to merely as "combats". It was issued as a standard order of dress for the pre-Unification Army, and later Regular Force "army" personnel in field units of Force Mobile Command and for personnel in field units or detachments in Canadian Forces Communication Command, as well as for personnel in other organizations as required for employment in a land combat environment. Combat uniforms were not issued to Reservists until 1972, although they were permitted to wear it if they purchased it themselves (usually at war surplus stores).